APA

Hurd P. D., Linsley E. G. & Michelbacher A. D. (1974). Ecology of the squash and gourd bee, Peponapis pruinosa, on cultivated cucurbits in California (Hymenoptera: Apoidea). Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Chicago

Hurd Paul David, Linsley E Gorton and Michelbacher A D. 1974. Ecology of the squash and gourd bee, Peponapis pruinosa, on cultivated cucurbits in California (Hymenoptera: Apoidea). Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Harvard

Hurd P. D., Linsley E. G. and Michelbacher A. D. (1974). Ecology of the squash and gourd bee, Peponapis pruinosa, on cultivated cucurbits in California (Hymenoptera: Apoidea). Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

MLA

Hurd Paul David, Linsley E Gorton and Michelbacher A D. Ecology of the squash and gourd bee, Peponapis pruinosa, on cultivated cucurbits in California (Hymenoptera: Apoidea). Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]. 1974.